Multiphoton quantum dynamics of many-electron atomic and molecular systems in intense laser fields

Peng-Cheng Li; Shih-I Chu

doi:10.1088/1674-1056/ab9c0f

Chinese Physics B, Volume. 29, Issue 8, (2020)

Multiphoton quantum dynamics of many-electron atomic and molecular systems in intense laser fields

Peng-Cheng Li^1,2、† and Shih-I Chu³

¹Research Center for Advanced Optics and Photoelectronics, Department of Physics, College of Science, Shantou University, Shantou 55063, China

²Key Laboratory of Intelligent Manufacturing Technology of MOE, Shantou University, Shantou 515063, China

³Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, USA

show less

Figures & Tables(13)

Fig. 1. (a) Time-dependent ionization probability of 3s, 3p₀, and 3p₁ valence electrons of Ar atom in intense ultrashort laser fields with the laser peak intensity I = 8.0 × 10¹³ W/cm². The laser wavelength is 800 nm, and the pulse length is 20 optical cycles with sin² pulse shape. (b) Same as (a) for the laser peak intensity I = 3.0×10¹⁴ W/cm².

Download full size

View in Article

Fig. 2. Time-dependent ionization probability of the different molecular orbitals electrons of N₂ and CO in 800 nm, sin² laser pulse with 20 optical cycles in pulse duration. (a) N₂ molecule, for the peak intensity of laser field I = 8×10¹³ W/cm². (b) CO molecule, for the laser peak intensity I = 5.0×10¹³ W/cm².

Download full size

View in Article

Fig. 3. The orientation-dependent MPI probabilities for N₂ molecule and Ar atom at the peak intensity (a) I = 1×10¹⁴ W/cm² and (b) I = 5×10¹⁴ W/cm².

Download full size

View in Article

Fig. 4. The p-state photoelectron-momentum-distribution cross section of (a) Ne and (b) Ar driven by the 800-nm, linearly polarized, 20-cycle laser pulse along the z axis with a peak intensity of I = 1.0×10¹⁴ W/cm².

Download full size

View in Article

Fig. 5. (a) Resonance-enhanced structures of the HHG from He as a function of the laser intensity and the photon energy in the single atom response. (b) Same as (a) but for I = 7.0×10¹³ W/cm², I = 8.0×10¹³ W/cm², and I = 9.0×10¹³ W/cm², respectively. The black dashed lines in (a) and (b) indicate the transition energy of the 1s²-1s2p^1P (21.22 eV), and the black solid lines indicate ionization potential I_p.

Download full size

View in Article

Fig. 6. (a) Phase-matching of resonance-enhanced structures from Ar atom simulated by the TDDFT/OEP-SIC in a 730-nm laser field. The shift of the phase-matched RESs relative to the bound state energies is indicated in the inset. The laser peak intensity in the center of gas jet is I = 3.0×10¹³ W/cm², the confocal parameter of the laser beam is 35 mm, the length of gas jet is 2.0 mm, the pressure is 40 Torr, and the target is set at the laser focus –2 mm. (b) Same as (a) for the 60 Torr pressure.

Download full size

View in Article

Fig. 7. (a) and (c) Evolution of harmonic intensities in space for the 7th order harmonic (7H) and the 15th order harmonic (15H) of H₂ molecules obtained from the mac TDDFT in an 800-nm laser field. The laser peak intensity in the center of gas jet is I = 8.0×10¹³ W/cm², the pulse length is 20 optical cycles with cos² pulse shape. (b) and (d) The corresponding phase difference of the HHG.

Download full size

View in Article

Fig. 8. A scheme of dual-gas QPM

Download full size

View in Article

Fig. 9. Enhancement of the HHG in dual-gas QPM. For the reference, the corresponding one-gas result (blue dotted lines) is presented.

Download full size

View in Article

Fig. 10. (a) High-order harmonic spectra of He atoms driven by two color combined laser field with the proper time delay t_d. (b) Attosecond pulse generation by superposing hundreds of the harmonics shown in (a).

Download full size

View in Article

Table 1. High-precision bound state energies of $H_{2}^{+}$ at internuclear separation 2 a.u.

View table

View in Article

Table 1. High-precision bound state energies of $H_{2}^{+}$ at internuclear separation 2 a.u.

State	Energy/a.u.
1σ_g	−1.1026342144949464615089689^a
	−1.1026342144949^b
1σ_u	−0.6675343922023829303619702^a
	−0.6675343922024^b
1π_u	−0.4287718198958564363139601^a
	−0.4287718198959^b
2σ_g	−0.3608648753395038450386998^a
	−0.3608648753383^b
2σ_u	−0.2554131650864845614172502^a
	−0.2554131650857^b

Table 2. Model potential parameters for He (in a.u.).

View table

View in Article

Table 2. Model potential parameters for He (in a.u.).

l	α	r_c	S	N	A₁	B₁	B₂
0	0.28125	2.0	−7.9093912	1	−10.899664	1.7	3.8
1	0.28125	2.0	1.50094970	1	0.11297684	1.3	3.8
2	0.28125	2.0	0.88294766	1	−0.032043029	1.3	3.8
3	0.28125	2.0	0.41193110	1	−0.129391180	1.3	3.8
≥3	0.28125	2.0	0.0	1	0.0	1.3	0.0

Table 3. Comparison of the calculated He atomic energies with the experimental values (in a.u.). For each angular momentum l, two rows of energies E_n,l are listed: the upper row refers to the calculated model-potential energies, and the lower row refers the experimental values.^[NIST]

View table

View in Article

Table 3. Comparison of the calculated He atomic energies with the experimental values (in a.u.). For each angular momentum l, two rows of energies E_n,l are listed: the upper row refers to the calculated model-potential energies, and the lower row refers the experimental values.^[NIST]

n	Energy E_n,l
n	l = 0	l = 1	l = 2	l = 3
1	−0.90369
	−0.90356
2	−0.14589	−0.12384
	−0.14595	−0.12382
3	−0.06152	−0.05515	−0.05562
	−0.06126	−0.05513	−0.05556
4	−0.03372	−0.03107	−0.03128	−0.03125
	−0.03358	−0.03125	−0.03127	−0.03125
5	−0.02125	−0.01990	−0.02001	−0.02000
	−0.02117	−0.01990	−0.02001	−0.02000
6	−0.01461	−0.01383	−0.01390	−0.01389
	−0.01456	−0.01383	−0.01389	−0.01388

Tools

Get Citation

Copy Citation Text

Peng-Cheng Li, Shih-I Chu. Multiphoton quantum dynamics of many-electron atomic and molecular systems in intense laser fields[J]. Chinese Physics B, 2020, 29(8):

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites

Paper Information

Category: Invited Review

Received: Apr. 27, 2020

Accepted: --

Published Online: Apr. 29, 2021

The Author Email: Li Peng-Cheng (pchli@stu.edu.cn)

DOI:10.1088/1674-1056/ab9c0f

Topics

Nuclear physics

Particles and fields

Particle and nuclear astrophysics and cosmology

Table 1. High-precision bound state energies of H2+ at internuclear separation 2 a.u.

Table 1. High-precision bound state energies of H2+ at internuclear separation 2 a.u.

Table 2. Model potential parameters for He (in a.u.).

Table 2. Model potential parameters for He (in a.u.).

Table 3. Comparison of the calculated He atomic energies with the experimental values (in a.u.). For each angular momentum l, two rows of energies En,l are listed: the upper row refers to the calculated model-potential energies, and the lower row refers the experimental values.[NIST]

Table 3. Comparison of the calculated He atomic energies with the experimental values (in a.u.). For each angular momentum l, two rows of energies En,l are listed: the upper row refers to the calculated model-potential energies, and the lower row refers the experimental values.[NIST]

Table 1. High-precision bound state energies of $H_{2}^{+}$ at internuclear separation 2 a.u.

Table 1. High-precision bound state energies of $H_{2}^{+}$ at internuclear separation 2 a.u.

Table 3. Comparison of the calculated He atomic energies with the experimental values (in a.u.). For each angular momentum l, two rows of energies E_n,l are listed: the upper row refers to the calculated model-potential energies, and the lower row refers the experimental values.^[NIST]

Table 3. Comparison of the calculated He atomic energies with the experimental values (in a.u.). For each angular momentum l, two rows of energies E_n,l are listed: the upper row refers to the calculated model-potential energies, and the lower row refers the experimental values.^[NIST]